The Salmonella cases were identified last month. Health investigators traced the outbreak to “mechanically separated” chicken produced by Tyson, leading the company to recall 34,000 pounds of chicken meat that might have been contaminated, CNN notes.

Poultry products affected by the chicken recall were produced on Oct. 11. The chicken recall covers poultry products shipped only to institutional customers in 40-pound cases holding four 10-pound chubs. Poutlry sent to restaurants or supermarkets is not affected by the chicken recall.

Salmonella is culprit behind more than 1.3 million cases of food poisoning in the U.S. each year.